Divide the grid into nine regions, each consisting of 9 orthogonally connected cells, such that every cell is part of exactly one region. Place the digits 1-9 exactly once in each row, column and region. Brown clues to the left and above the grid are Sandwich clues: They indicate the sum of the digits between the 1 and 9 in that row or column. In rows and columns that have a Sandwich clue, all the digits between the 1 and 9 must be in the same region, and the 1 and 9 must not belong to that region. All regions that do not touch the edge of the grid are Pie filling: Black clues below the grid indicate the sum of the digits within Pie filling in that column.